Diogo Bolant was all set to marry his fiance, Nicole, when he realized there was someone else he wanted to spend the rest of his life with, too.

Nicole's 6-year-old daughter, Isadora.

Diogo and Nicole were at the altar with Isadora, the maid of honor, when Diogo got down on one knee, saying, "I want to ask you something."

Isadora was totally taken off guard. But when he asked this question, she immediately started crying.  

"Do you agree to be my daughter forever?"

He had a ring for Isadora and everything. The little girl immediately replied yes, and the two embraced.

"Isadora always wanted us to get married," Diogo said. "And I wanted to do a special tribute for her so she felt part of the moment in front of our guests. I had this idea of a surprise with Nicole a little while ago. It was so Isa could feel part of this family that is forming."

Diogo and Nicole had been dating for 3 years before he proposed, so Diogo watched little Isadora grow up. It only made sense to make their bond permanent.

As for Isadora, she has vowed to never take the ring off!